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Tag for the usage of "FiniteDifference" Method embedded in NDSolve and implementation of finite difference method (fdm) in mathematica.

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How to invert Differences[list, order] with order >1?

Differences order 1 can be invert using FoldList[], but does not work with higher orders. For Example Differences[{a, b, c, d, e, f, g}, 3] {-a + 3 b - 3 c + d, -b + 3 c - 3 d + e, -c + 3 d - 3 e …
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